spider farmer ggs sensor pro kits 5-in-1 for indoor growing env. precision | new version, real-time monitoring ppfd/vpd/temp/humid/co2, high accuracy plant multi-sensor, for grow tent rooms greenhouse is up for auction in Patio, Lawn & Garden. The current bid is $12.00, 80% below the $59.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.